Locomotive stoker



' Feb. 6, 1940.,

c. J. suRnY i LOCOMOTIVE STOKER Filed May 5, 1937 2 Sheets-Sheet 1 46 MUUUUHUUUU INVENTOR Chawles J 5w/dy m ATTORNEYS.

Feb. 6, 1940. c. J. suRDY LOCOMOTIVE STOKER 2 sheets-sheet 2 File@ May 5, 1937 1N VENT OR ATTORNEYS Patented Feb. 6, 1940 UNITED vsryrias PATENT oFFIcE Charles .I.' Surdy, Tuckahoe, N. Y., asssignor to The Standard Stoker Company, Incorporated, a corporation'ofDelaware Application Mays, 1937, serialr No. 149,828

9 Claims.y (o1. 11o-104) This invention relates to locomotlvefstokers and'particularly to locomotive stokers of'the type shown and described in Patent No.' 1,829,044, granted October 27, 1931, to C. M. Hatch. Stokers of the patented type are proposed for installation on locomotives wherein thefoundation or mud ring'of the locomotive firebox is spaced so closely above the locomotive frame that it is not feasible to pass a Stoker conduit between the frame and mud ring and thence upwardly intoy the iirebox. Stoker conduit enters the rebox immediately above the mud ring through an opening which extends above the locomotive cab deck and is substantially of inverted U-shape. l it -is the principal object of this invention to provide, in a stoker adapted to enter the firebox through' an openingabove the foundationnring, a novel-protective grate whihc surrounds that portion of the Stoker conduit within the furnace or rebox;y 'Y v More specica1ly,.it is an object of this invention to provide anovel protective grate for that portion of the Stoker conduit within the nrobox,

such protectivegrate being supported upon the central'grate bearer bar of the furnace or rebox. A further'object lof this invention v residesmin so constructing the protective grate that it rests upon the central bearer bar vof the furnace and also servesvas asupport for re'fgrates ofthe furnace.

, A still further object of this invention resides in constructing the lower portion of the `protective grate as an integral casting arranged'to be seated upon the customary central grate bearer bar of the nrebox and also formed to support the upper portion of the protective grate, which latter portion may include several sections.v I

These and other objects and advantagesofthe present invention will become apparent upon reading of the following description inl connection with the accompanying drawings, in which '"Fig.4 1 is a vertical section through the central portion of the rearward end of a locomotive showing the stoke'r' in side elevation and the novel protective'grate structure partly insimilar section and partly in side elevation; 1 y Fig..2 is a view in plan'taken on the linelf of Fig. 1 with portions of the locomotiveoab deck removed; 1 v 1 Fig. 3 is a sectional View taken on the l line 3-3 voflt"ig.4; and 1 f Fig. 4. is a sectional view froml within`.the lire- Accordingly, the

In these drawings, L indicates a locomotive having a boiler I0 supported above the frame II. The boiler I0 comprises a rebox I2 having a backwall I3v and a cab deck I4 extending rear#- wardly therefrom. A foundation or mud ring vI5 forms'the base of the rebox 4I2 and to which the inner and outer sheets I5 and I'I, respectively, of the rebox are secured. Extending longitudinally and centrally of the iirebox is a bar I8, the upper `surface I9 of which is disposed slightly above the lower portion of the foundation ring I5. The bar I8 is provided with recesses such as 20 in each of which is received a trunnion 2| formed on the inner vside of grate bars 22. A similar arrangement supports the outward ends of the grate bars adjacent the sides of the rebox. Attached in any known manner to the inner side `of the foundation ring yI5 is a casting 23 which forms a support for the rearward end of the bar I8 and to which are also secured the ash pan sheets 24.

'I'he `foundation ring I5 is provided with an upstanding portion 25 of inverted U-shape arranged to form an aperture 26 in the rebox backwall I3.'r This aperture26 extends upwardly from the foundation ring I5 to a point above the'cab deck' I4 and is divided by a plate element 2l yinto an upperopening 28 and a4 lower opening '29. A firedoor 30, which may beoperated manually or by power means, closes the upper opening 28. Access to the interior of the flrebox is gained through the opening 28.

f Normal firing ofthe firebox is accomplished by means of a stoker S comprising a tubular conduit 3I having an upturned elbow 32 at its forward end. The elbow 32, is secured to the tubular conduit 3I by bolts such as 33 and forms, in effect, an upwardly and forwardly extending continuation 'of the tubular conduit which conduit is secured to the foundation ring by support brackets 34, 35. At its rearward end, the tubular conduit 3| is universally connected at 36-to a conduit 31 leading forwardly from the tender fuel bin (not shown). The means for urging fuel along the conduits 3l, 3l and thence upwardly through the elbow 32 is in the form of a conveyor screw 38, the forward end of which terminates adjacent the forward end of the tubular conduit 3l.

The elbow 32 has an upwardly directed fuel `discharge mouth 39 which lies .wholly within the plate element 21 at its upper end and partially embraces the stoker tubular conduit 3|. Immediately beneath the forward end portion of the plate element 2l, the elbow 32 has secured thereto by bolts @lil a distributor member lll. Fluid under pressure is conducted to the distributor member cli by supply lines 42 and thence is discharged through jet apertures i3 in a plane above and parallel to the upper terminal portion 4 4 of the discharge mouth. 39. .As the fuel isI urged upwardly through the elbow 32 by the conveyor screw S8, it rises above the terminal portion 44 and into the zone of action of the distributor member Lil. The blast of pressure fluid issuing from the jet apertures i3 of the member 4I propels the rebed.

it is propelled forwardly by the distributor member 4l, a table 125 embraces the terminal portion 44 of the elbow 32 and is seated upon a ledge 8 formed therewith.

Since the elbow 'extends into the rebox' a substantial distance, a protective grate G is utilizedto protect it from the heat of the flrebox. Heretofci'e, it has been customary to support the portective gratev from the center grate bearer bar which was' of special construction. In some instances, it has been proposed to suspend the protective grate from the stoker discharge conduit, but this imposes a considerable strain on the conduit if a protective grate of the substantial size necessary is used.

In the present invention, the protective grate G is supported on the bar' i8 which bar is of usual construction. The protective grate G comprises a lower section-it which in horizontal section is substantially U-shaped with the outer ends il thereof extending closely adjacent the inner sheet i5 of the iirebox. Extending longitudinally at thelower central portion of the U- shaped section riti is' an inverted channel d8 which is integrally formed with the section [s6 and otherwise firmly related therewith by ribs such as'l. The inverted channel L33 is adapted to t over the bar i8 and is secured thereto `by boltsv 5i). Each of the outer ends @il is secured by bolts 5l to lugs 23a formed with the ash pan support casting 23; lIn this manner, the lowersection 4G of the protectivegrate G is rmly secured to the conventional grate bearer bar i8.

Atop the lower section fit, is a grate element 5| which may be in the4 form of side sections 52, 53 removably carried by the lower section below the table Air entering through the ash pan is entrained through slots formed in the grate sections G33-, $2, and for cooling the same. Each lateral side loi the Ushaped lowersection i6 is provided with recesses such as '55, each arranged to receive a trunnion 55 of a grate'bar 5l. These grate bars El are shorter than the main grate bars 22 and at their outermost ends are supported in the usual manner along the inner side sheets 0f the Firebox. From the foregoing, those familiar with the art will readily understand that by the present invention a novel Stoker protective grate structure has been devised which requires no c-hanges in the center grate bearer bar while aioiding adequate support for the grates at each side of the stoker protective grate.

I claim:V

l. In a rebox having an upstanding Wall provided with an opening therein, the combination of grate bearer bar in the lower portion of said rebox, a Stoker conduit passing through said opening into said rebox, said grate bearer bar extending longitudinally of the rebox and being substantially straight throughout, a portion of said grate bearer bar extending under that portion of the conduit within the iirebox, a protective grate embracing such portion of the conduit, said protective grate being supported by said grate bearer bar, a rebox grate at eac-h side of said protective grate andmeans formed with the lower end of said protective grate forming a support for said rebox grates.

2. In a rebox having an upstanding wall provided With an opening therein, the combination of a'grate bearer bar in the lower portion of said rebox, a Stoker conduit passing through said opening into said rebox, said grate bearer bar extending longitudinally of the rebox and being substantially straight throughout, a portion of said grate bearer bar extending under that portion of the conduit within the firebox, a protective grate embracing such portion of the conduit, said` protective grate being secured to said grate 'bearer bar, arebox grate at each side of said protective grate and means formed with the lower end of said protective grate forming a support for said flrebox grates.

" 3.' In aiirebox having an upstanding wall provided with `a base member and an opening extending above said base member, the combination of a great bearer bar in the lower portion ol said rebox and a support for said grate bearer bar, a-stoker conduit passing above said base member throughsaid opening into said rebox, said grate bearer bar extending longitudinally of the' rebox' and being substantially straight throughout, a portion of said grate bearer bar extending under that portion of the conduit within the firebox, av protective grate embracing such portion of the conduit, said protective grate being supported by said grate bearer bar, and means at each side of said grate bearer bar forming an additional support for said protective grate.

4. In a Vflrebox having an upstanding wall provided' with'a base member andan opening extending above said base member, the combination of a grate bearer bar in the lower portion of said irebox and a support for said grate bearer bar, a stoker conduit passing above said base member through said opening into said rebox, said grate bearer bar extending longitudinally of the rebox i and being substantially straight throughout, a portion of said grate bearer bar extending under that portion of the conduit within the` rebox, av protective grate embracing such portion of the conduit, said protective grate being supported by saidgrate bearer bar, means at each side oi' saidfgrate bearer bar forming an additional support fors'aid protective grate,` and a firebox grate at each side of said protective grate supported thereby.

'5L As an article of manufacture, a Stoker conduit protective grate comprising a U-shaped section', and a. channel portion formed integrally with said U-shaped section, said channel portion opening downwardly when said protective grate is in operative position, said channel portion extending approximately parallel to the sides of said U- shaped section and being spaced equidistant therefrom. 6.' Asan article of manufacture, a stoker conduit protective grate comprising a U-shaped section, a channel portion formed integrally with said U-shaped section, said channel portion open; ing downwardly when said protective grate is in operative position, said channel portion extending `shaped section and being spaced equidistant therefrom, and rebox grate' supporting means formed along the sides of said U-shaped section.

-7. In a irebox having an upstanding wall provided with an opening therein,the combination of a grate bearer bar in the lower portion of said rebox, a Stoker conduit passing through said opening into said nreoox,` said grate bearer bar being substantially straight throughout and extending under that portion of the conduit within the rebox, and a protective grate embracing such portionof the conduit, said grate comprising a U-shaped section and means between and rigid with the sides of said U-shaped section engaging the portion of said grate bearer bar under said conduit for supporting said protective grate on said grate bearer bar. y o

8. In a rebox having an upstanding wall provided with an opening therein, `the combination of a grate bearer bar in the lower portion of said iireloox, a Stoker conduit passing through said t opening-into said rebox, said grate bearer bar extending under that portion of the conduitwithin the rebox, and a protective grate embracing such portion of the conduit, said grate comprising a U-shaped section and a downwardly opening channel portion between thev sides of said U- shaped sectionpthe portion of said grate bearer barunder said conduit being received in said channel portionv and forming a support forsaid protective grate.

9. In a firebox having an upstanding wall provided With Aan opening therein, the combination of a grate bearer bar in the lower portion of said rirebox, a Stoker conduitpassing through said opening into said rebox, said grate bearer bar extending ylongitudinally ofthe firebox and being substantially straight throughout, a portion of said grate .bearer bar extending under that portion'of the conduit within the rebox, a protective grate embracing such portion ofthe conduit, said protective grate being supported by said grate bearer bar, and means at each side of saidgrate bearer bar forming additional support means for said protective grate.`

` v CHARLES J. SURDY. 

